【问题标题】：Mysql 1366 error- utf8mb4 encoding usedMysql 1366错误-使用了utf8mb4编码
【发布时间】：2018-07-02 16:45:42
【问题描述】：

def connect():
    conn = mysql.connector.connect(host='localhost', database='otrs',     user='root', password='password', autocommit=True)
    if conn.is_connected():
        print('connected')
    sqlstr = "SELECT ticket.id, article.id, ticket_history.create_time, article.a_body FROM ticket, ticket_history, article WHERE ticket_history.ticket_id=ticket.id AND ticket_history.article_id=article.id AND (ticket.ticket_state_id=2 OR ticket.ticket_state_id=3) AND ticket_history.name ='%%Close' ;"

    cursor.execute(sqlstr)
    for row in cursor.fetchall():
        print row
        val= row[3].replace('\'','')
        print val
        sqlstr1 = "INSERT INTO temp VALUES (%s, %s, '%s','%s')" %(row[0], row[1], row[2], val)
        cursor.execute(sqlstr1)
        print 'done'

我编写了一个 python 查询来从 mysql 表中的表中插入选择数据并将它们写入临时表。当我执行查询时，插入几行数据后，它会引发类似

的异常

DatabaseError: 1366 (HY000): Incorrect string value: '\xE2\x80\x8BWil...'
DatabaseError: 1366 (HY000): Incorrect string value: '\xE2\x80\x8BVid...'
DatabaseError: 1366 (HY000): Incorrect string value: '\xE2\x80\x8BSol...'

提出问题的条目是，

(2932, 10503, datetime.datetime(2016, 10, 19, 17, 2, 7), u'Hi Arshadh,\n\nThis has been configured on PR FWSM device only\n\nBR,\n\u200bViduna\n\xa0')
(3136, 13353, datetime.datetime(2016, 11, 25, 12, 40, 35), u'This has been postponed as we need support from forinet TAC team to resolve\nthis.\nWaiting for their feedback.\n\u200bWill raise new ticket when we get update from them\n')
(3661, 18395, datetime.datetime(2017, 1, 27, 15, 34, 45), u'This request has been performed on 1/26/2017,\n\u200bSince the testing is getting delayed- closing the cr\xa0\nwe can reopen this again if there is any problem.\n')

但是下面的数据集并没有报错，

(3672, 18393, datetime.datetime(2017, 1, 27, 15, 28, 9), u'This request has been performed on 1/26/2017,\nSince the testing is getting delayed- closing the cr\xa0\nwe can reopen this again if there is any problem.\n')

因此，如果使用 \n\u200b 而不是 \n ，则会引发问题。我到处搜索，但找不到解决方案。我认为错误是因为 ASCII 特殊字符。但我不知道如何解决这个问题。

【问题讨论】：

为什么要取数据到客户端？在 MySQL 中使用insert ... select ... 语法在表之间直接传输数据。
我想找到不允许我运行该查询的错误
insert into temp_calc_resolved SELECT ticket.id, ticket_history.create_time, article.a_body FROM ticket,ticket_history, article WHERE ticket_history.ticket_id=ticket.id and (ticket.ticket_state_id =2 OR ticket.ticket_state_id =3) and ticket_history.name ="%%Close" and ticket_history.article_id=article.id;
这个查询对你有用吗？
不，它会引发同样的错误

标签： mysql mysql-python

【解决方案1】：

访问https://mathiasbynens.be/notes/mysql-utf8mb4 这是因为 MySQL 的 utf8 字符集仅部分实现了正确的 UTF-8 编码。所以将数据库转换为 utf8mb4 解决了这个问题。

对于每个数据库：

ALTER DATABASE database_name CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;

对于每个表：

ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

执行这些查询，解决了问题。

【讨论】：